Mold for plastic material.



E. FUCHS.

I MOLD FOB PLASTIC MATERIAL.

APPLICATION FILED MAY 5.1911. RENEWED JUNE 7, 1913. 1,1 12,284.

Patented Sept. 29, 1914.

UNITED STATES PATENT OFFICE.

nnNEsTo FUCHS, or GUADALAJARA, MEXICO.

MOLD FOR PLASTIC MATERIAL.

Specification of Letters Patent. Patented Sept.29, 1914.

Application filed May 5, 1911, Serial No. 625,137. Renewed June 7, 1913.Serial No. 772,423.

To all whom it may concern Be it known that I, EnNnsTo FUoHs, a citizenof the United States of America, residing at Guadalajara, Mexico, haveinvented new and useful Improvements in Molds for Plastic Material, ofwhich the following is a specification.

This invention relates to improvements in molds and has particularapplication to a mold for manufacturing articles of plastic materialsuch as concrete, cement, plaster and artificial stone and the like.

In carrying out the present invention, it is my purpose to provide aform of mold wherein moldings having deep spaces or voids, such asdenticular, mutular or other like orders may be made withouttheliability of breakage of the dentils or teeth such as is commonlyincident to the use of the ordinary mold.

A further object of my invention is the provision of a mold embracing inits con struction a face plate contoured or shaped to form the generalfeatures of the object to be molded and provided with a number ofopenings, and spacing blocks removably mounted in the openings andadapted to be withdrawn or removed after the molding process, so thatthe article being molded will not only have clean sharp surfaces, butbreaking or injuring of the sharp angular surfaces or teeth will beobviated.

With the above and other objects in view, the invention consists in theconstruction, combination and arrangement of parts hereinafter set forthin and falling within the scope of the claims.

In the accompanying drawing: Figure 1 is a perspective view of a moldembodying my invention. Fig. 2 is a similar view of the same with thespacing blocks removed. Fig. 3 is a front view of the mold, and Fig. 4is a rear view thereof.

Heretofore in the molds of this general character with which I amacquainted, it has been the practice to firmly and rigidly fix thespacing blocks to the face plate at the front thereof, these blocksbeing tapered for the purpose of avoiding the sticking and breaking ofthe molding. But, notwithstanding this tapering the molding frequentlybreaks at the teeth or dentils thereof with a result that the use ofsuch mold is generally unsatisfactory, and numerous moldings arefrequently spoiled. By the use of my improvement I avoid suchobjections, and at the same time obtain a classic denticular or mutularorder or the like without altering the shapes or proportions of theclassic orders.

In the drawing, I have shown a mold designed to be used in makingmoldings of the Ionic type, although it will, of course, be understoodthat the invention is applicable to the manufacture of moldings. ofother classic orders, such for instance, as the Dorie and Corinthian.

Referring now to the accompanying drawing the detail, the letter Adesignates the face plate of the mold comprising the members 1 and 2having openings 3 formed therebetween and spaced appropriate distancesapart through the medium of the blocks 1. The members 1 and 2 and theblocks 1 of the face plate are preferably integral with one another,although, it will be understood, of course, that the same may beseparable, if such is deemed desirable, and this face plate is contouredor shaped to form the general features of the object to be molded. Inorder to prevent breakage or mutilation of the teeth or dentils of theobjeet'being molded, I employ a plurality of spacing blocks which aredetachably or removably associated with the face plate so that after theobject has been molded, such blocks may be removed to enable thesubsequent re moval of the face plate without fracturing or otherwiseinjuring the molding. These spacing blocks are indicated by the numeral5 and are designed to be inserted in the openings in the main body A andare provided with stops 6 to prevent them from passing any farther thana predetermined distance, the stops in the present instance being shownin the form of pins, such blocks being guided in the rear of the mold bythe guide rails 7. These blocks, in the present instance, are furtherprovided with sockets or bores 8 through which may be inserted a rod orother pole for the purpose of removing the blocks when desired. Ifdeemed necessary or found desirable, the main body of the mold may beprovided, as shown in the drawing, with ribs 9 which serve to maintainthe mold in a true position.

The above is a description of my improved mold, and the manner ofemploying the same is substantially as follows: The face plate of themold with the inserted spacing blocks is placed on the pallet orplatform customarily used in the plastic -or exceeding the scope of artand the mold box or flask is then placed in position around the mold andthe plastic material rammed into the mold box filling all the spacesaround and over the mold. When the mass has been properly tamped, the,box containing the face plate and the plastic material is turned upsidedown and the mold box is then opened, leaving the mold or face plateresting tightly on the molding material. Now, holding the face platefirmly against the molded mass, the space blocks are pulled out one at atime from the rear by inserting a hook or other tool in the sockets orholes 8 and pulling toward the rear. After all of the space blocks tronsof ornamental character in the molded object to form the dentils orteeth of the order.

I wish it to be understood that I do not 1ll11ll/ my invention in itsuseful application to the precise formwhich for the purpose ofillustration is herein delineated, as modification and variation'may bemade without departing from the spirit of the invention the appendedclaims.

ll claim:

' 1. In a mold for forming plasticmaterial, a face plate contoured toform the general features of the object and composed of two sectionsspaced apart in parallel relation, blocks'interposed between saidsections and forming a series of openings spaced apart and extendingfrom the rear to the front of the plate, spacing blocks slidingly fittedin and adapted to be protruded through and withdrawn within saidopenings, said blocks being adapted to produce a succession of regulardepressions, leaving thereby a series of regularly recurring projectionsof an ornamental character in the molded object.

2. In a mold for forming plastic material, a face plate contoured toform the general features of the object and composed of two sectionsspaced apart in parallel relation, blocks interposed between. saidsections and forming a series of openings spaced apart and extendingfrom the rear to the front of the plate, spacing blocks slidingly littedin and adapted to be protruded through and withdrawn within saidopenings, said blocks being adapted to produce a succession of regulardepressions, leaving thereby a series of regularly recurring projectionsof an ornamental character in the molded object, and means for guidingsaid blocks when withdrawn from said openings.

3. In a mold for forming plastic material, a face plate contoured toform the gene 'al features of the object and composed of two sectionsspaced apart in parallel relation, blocks interposed between saidsections and forming a series of openings spaced apart and extendingfrom the rear to the front of the plate, spacing blocks slidingly fittedin and adapted to be protruded through and withdrawn within saidopenings, said blocks being adapted to produce a succession of regulardepressions, leaving thereby a series of regularly recurring projectionsof an ornamental character in the molded object, means for guiding saidblocks when withdrawn from said openings, and means for limiting themovement of said blocks when protruded through said openings.

In testimony whereof I allix my signature in presence of two witnesses.ERNESTO FUCHS.

Witnesses U. Nnunaxn, AUDORY ARrY.

Gopies oif'this patent may be obtained for five cents each, byaddressing the Commissioner of Patents.

' Washington, D. 0.

